Question

What temperature is minus 40 degrees Celsius?

Answer 1

If you find yourself needing to quickly convert Celsius to Fahrenheit, here is a simple trick you can use: multiply the temperature in degrees Celsius by 2, and then add 30 to get the (estimated) temperature in degrees Fahrenheit.Jun 22, 2018');})();(function(){window.jsl.dh('_1IeLYOPLEeW60PEPxfm6qAE45','

Why are -40 degrees Celsius and -40 degrees Fahrenheit equal, but ...

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Search for: Why is 40c the same as 40f?

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-40 is just the number where they happen to intersect. tl;dr; The formula to convert Fahrenheit to Celsius is (F - 32) * 5/9 = C. -40 is the point where F is equal to C. Because of the formula they're related to each other.